First stop Flora Grubb an amazing container palace focused on drought tolerant plants complete with an outlet of the local espresso wonder Ritual Coffee.
Vertical containers, definitely an inspiration.
Then off to Building Resources, the best alternative to Home Depot anywhere, get your recycled, reusable household and garden gear here. But what makes BR better than Urban Ore (it's sister center in the East Bay) is that there are container gardens tucked into every corner.
You can find red, yellow, and green light covers from stoplights. Old photo equipment. Doorknobs in every shape & size. Chandeliers, suitcases, windows, doors, and toilets. And this awesome vending machine.